TY  - EJOU
AU  - Zhao, Zhenjiang 
AU  - Jiang, Lei 
AU  - Bai, Ling 
AU  - Pan, Bo 
AU  - Zhou, Ling 

TI  - Numerical Simulation and Entropy Production Analysis of Centrifugal Pump with Various Viscosity
T2  - Computer Modeling in Engineering \& Sciences

PY  - 2024
VL  - 141
IS  - 2
SN  - 1526-1506

AB  - The fluid’s viscosity significantly affects the performance of a centrifugal pump. The entropy production method and leakage are employed to analyze the performance changes under various viscosities by numerical simulation and validated by experiments. The results showed that increasing viscosity reduces both the pump head and efficiency. In addition, the optimal operating point shifts to the left. Leakage is influenced by vortex distribution in the front chamber and boundary layer thickness in wear-ring clearance, leading to an initial increase and subsequent decrease in leakage with increasing viscosity. The total entropy production  inside the pump rises with increasing viscosity. The different mechanisms dominate under varying conditions: Turbulent dissipation dominates at low viscosity. Under high-viscosity conditions, energy loss is primarily caused by direct dissipation  and wall entropy production . This study provides a deeper and more objective understanding of the energy characteristics of centrifugal pumps handling fluids of various viscosity, potentially aiding in optimizing pump design and improving energy conversion efficiency.
KW  - Centrifugal pump; numerical simulation; viscosity; leakage; entropy production

DO  - 10.32604/cmes.2024.055399